S17400 Stainless Steel vs. S15500 Stainless Steel
Both S17400 stainless steel and S15500 stainless steel are iron alloys. They have a very high 98% of their average alloy composition in common.
For each property being compared, the top bar is S17400 stainless steel and the bottom bar is S15500 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 280 to 440 | |
| 290 to 430 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 11 to 21 | |
| 6.8 to 16 |
| Fatigue Strength, MPa | 380 to 670 | |
| 350 to 650 |
| Impact Strength: V-Notched Charpy, J | 7.6 to 86 | |
| 7.8 to 53 |
| Poisson's Ratio | 0.28 | |
| 0.28 |
| Reduction in Area, % | 40 to 62 | |
| 17 to 40 |
| Rockwell C Hardness | 27 to 43 | |
| 27 to 46 |
| Shear Modulus, GPa | 75 | |
| 75 |
| Shear Strength, MPa | 570 to 830 | |
| 540 to 870 |
| Tensile Strength: Ultimate (UTS), MPa | 910 to 1390 | |
| 890 to 1490 |
| Tensile Strength: Yield (Proof), MPa | 580 to 1250 | |
| 590 to 1310 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 280 |
| Maximum Temperature: Corrosion, °C | 450 | |
| 440 |
| Maximum Temperature: Mechanical, °C | 850 | |
| 820 |
| Melting Completion (Liquidus), °C | 1440 | |
| 1430 |
| Melting Onset (Solidus), °C | 1400 | |
| 1380 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 480 |
| Thermal Conductivity, W/m-K | 17 | |
| 17 |
| Thermal Expansion, µm/m-K | 11 | |
| 11 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.3 | |
| 2.2 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.6 | |
| 2.5 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 14 | |
| 13 |
| Density, g/cm3 | 7.8 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 2.7 | |
| 2.7 |
| Embodied Energy, MJ/kg | 39 | |
| 39 |
| Embodied Water, L/kg | 130 | |
| 130 |
Common Calculations
| PREN (Pitting Resistance) | 16 | |
| 15 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 140 to 160 | |
| 98 to 120 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 880 to 4060 | |
| 890 to 4460 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 25 |
| Strength to Weight: Axial, points | 32 to 49 | |
| 32 to 53 |
| Strength to Weight: Bending, points | 27 to 35 | |
| 26 to 37 |
| Thermal Diffusivity, mm2/s | 4.5 | |
| 4.6 |
| Thermal Shock Resistance, points | 30 to 46 | |
| 30 to 50 |
Alloy Composition
| Carbon (C), % | 0 to 0.070 | |
| 0 to 0.070 |
| Chromium (Cr), % | 15 to 17 | |
| 14 to 15.5 |
| Copper (Cu), % | 3.0 to 5.0 | |
| 2.5 to 4.5 |
| Iron (Fe), % | 70.4 to 78.9 | |
| 71.9 to 79.9 |
| Manganese (Mn), % | 0 to 1.0 | |
| 0 to 1.0 |
| Nickel (Ni), % | 3.0 to 5.0 | |
| 3.5 to 5.5 |
| Niobium (Nb), % | 0.15 to 0.45 | |
| 0.15 to 0.45 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.040 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.030 |